Natural predators and parasites which kill aphids will usually limit the damage due.

There are many reasons your tree’s leaves can turn black and fall off the tree.

The following are some of the more probable causes: Hot Weather and Drought – During times of drought, trees are more susceptible to being damaged by radical changes in temperature. Sudden rises in temperature can leach the moisture out of your trees and cause Estimated Reading Time: 5 mins. When the leaves are falling off your tree during the summer another problem that could cause this would be if your tree is suffering from a fungal or bacterial infection and your tree could be putting all of its energy into fighting the infection rather than keeping its leaves green and treeclear.barted Reading Time: 6 mins.

Jan 07, More brownish-black than purple. The leaves around the perimeter of the plant are just fine - the ones in the center, directly under the light, are getting hammered. This is an insanely bright LED lamp (impulse buy on Ebay), rated at W, including a Estimated Reading Time: 7 mins. Sep 01, It's a pest or disease.

First, see what type of tree you have.

See what summer pest could be hurting your tree leaves. If those symptoms don’t match, check if a leaf disease is the issue. It's something in the water. Too much or too little water can cause late summer leaf loss. Check your tree’s moisture levels, and then plan the best watering regimen.

Two Common Causes of Spring Leaf Drop.

Such pathogens can harm an entire orchard of cherry trees, putting a full halt to any charming blossoms or juicy fruit.

Some trees tend to hang on to a portion of their leaves through the winter, making spring leaf drop perfectly normal. We usually think of fall as the season for shedding, but there are a few tree species that go against the grain. But if you don’t have a tree that naturally loses its leaves in spring, your tree could have an infection.